Can anyone help me??? I have a 89 with a 93 cobra motor and I am getting a visible spark from one plug.... plugs and wires are brand new,plug is secure in head and wire is on but i can see the spark.just started after i replaced plugs/wires. Only happens on one plug...please help this is driving me crazy....thanx

 

probably a broken boot or plug insulator.also try putting some grease in the boot

 

i would replace that 1 plug

 

yeah you probably cracked it during installation just a single plug will do teh job!